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diff --git a/src/kernel/qstylesheet.cpp b/src/kernel/qstylesheet.cpp new file mode 100644 index 0000000..a61914d --- /dev/null +++ b/src/kernel/qstylesheet.cpp @@ -0,0 +1,1623 @@ +/**************************************************************************** +** +** Implementation of the QStyleSheet class +** +** Created : 990101 +** +** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved. +** +** This file is part of the kernel module of the Qt GUI Toolkit. +** +** This file may be used under the terms of the GNU General +** Public License versions 2.0 or 3.0 as published by the Free +** Software Foundation and appearing in the files LICENSE.GPL2 +** and LICENSE.GPL3 included in the packaging of this file. +** Alternatively you may (at your option) use any later version +** of the GNU General Public License if such license has been +** publicly approved by Trolltech ASA (or its successors, if any) +** and the KDE Free Qt Foundation. +** +** Please review the following information to ensure GNU General +** Public Licensing requirements will be met: +** http://trolltech.com/products/qt/licenses/licensing/opensource/. +** If you are unsure which license is appropriate for your use, please +** review the following information: +** http://trolltech.com/products/qt/licenses/licensing/licensingoverview +** or contact the sales department at [email protected]. +** +** This file may be used under the terms of the Q Public License as +** defined by Trolltech ASA and appearing in the file LICENSE.QPL +** included in the packaging of this file. Licensees holding valid Qt +** Commercial licenses may use this file in accordance with the Qt +** Commercial License Agreement provided with the Software. +** +** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, +** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted +** herein. +** +**********************************************************************/ + +#include "qstylesheet.h" + +#ifndef QT_NO_RICHTEXT + +#include "private/qrichtext_p.h" +#include "qlayout.h" +#include "qpainter.h" +#include "qcleanuphandler.h" + +#include <stdio.h> + +class QStyleSheetItemData +{ +public: + QStyleSheetItem::DisplayMode disp; + int fontitalic; + int fontunderline; + int fontstrikeout; + int fontweight; + int fontsize; + int fontsizelog; + int fontsizestep; + int lineSpacing; + QString fontfamily; + QStyleSheetItem *parentstyle; + QString stylename; + int ncolumns; + QColor col; + bool anchor; + int align; + QStyleSheetItem::VerticalAlignment valign; + int margin[5]; + QStyleSheetItem::ListStyle list; + QStyleSheetItem::WhiteSpaceMode whitespacemode; + QString contxt; + bool selfnest; + QStyleSheet* sheet; +}; + +/*! + \class QStyleSheetItem qstylesheet.h + \brief The QStyleSheetItem class provides an encapsulation of a set of text styles. + + \ingroup text + + A style sheet item consists of a name and a set of attributes that + specifiy its font, color, etc. When used in a \link QStyleSheet + style sheet\endlink (see styleSheet()), items define the name() of + a rich text tag and the display property changes associated with + it. + + The \link QStyleSheetItem::DisplayMode display mode\endlink + attribute indicates whether the item is a block, an inline element + or a list element; see setDisplayMode(). The treatment of + whitespace is controlled by the \link + QStyleSheetItem::WhiteSpaceMode white space mode\endlink; see + setWhiteSpaceMode(). An item's margins are set with setMargin(), + In the case of list items, the list style is set with + setListStyle(). An item may be a hypertext link anchor; see + setAnchor(). Other attributes are set with setAlignment(), + setVerticalAlignment(), setFontFamily(), setFontSize(), + setFontWeight(), setFontItalic(), setFontUnderline(), + setFontStrikeOut and setColor(). +*/ + +/*! \enum QStyleSheetItem::AdditionalStyleValues + \internal +*/ + +/*! + \enum QStyleSheetItem::WhiteSpaceMode + + This enum defines the ways in which QStyleSheet can treat + whitespace. + + \value WhiteSpaceNormal any sequence of whitespace (including + line-breaks) is equivalent to a single space. + + \value WhiteSpacePre whitespace must be output exactly as given + in the input. + + \value WhiteSpaceNoWrap multiple spaces are collapsed as with + WhiteSpaceNormal, but no automatic line-breaks occur. To break + lines manually, use the \c{<br>} tag. + +*/ + +/*! + \enum QStyleSheetItem::Margin + + \value MarginLeft left margin + \value MarginRight right margin + \value MarginTop top margin + \value MarginBottom bottom margin + \value MarginAll all margins (left, right, top and bottom) + \value MarginVertical top and bottom margins + \value MarginHorizontal left and right margins + \value MarginFirstLine margin (indentation) of the first line of + a paragarph (in addition to the MarginLeft of the paragraph) +*/ + +/*! + Constructs a new style called \a name for the stylesheet \a + parent. + + All properties in QStyleSheetItem are initially in the "do not + change" state, except \link QStyleSheetItem::DisplayMode display + mode\endlink, which defaults to \c DisplayInline. +*/ +QStyleSheetItem::QStyleSheetItem( QStyleSheet* parent, const QString& name ) +{ + d = new QStyleSheetItemData; + d->stylename = name.lower(); + d->sheet = parent; + init(); + if (parent) + parent->insert( this ); +} + +/*! + Copy constructor. Constructs a copy of \a other that is not bound + to any style sheet. +*/ +QStyleSheetItem::QStyleSheetItem( const QStyleSheetItem & other ) +{ + d = new QStyleSheetItemData; + *d = *other.d; +} + + +/*! + Destroys the style. Note that QStyleSheetItem objects become + owned by QStyleSheet when they are created. +*/ +QStyleSheetItem::~QStyleSheetItem() +{ + delete d; +} + +/*! + Assignment. Assings a copy of \a other that is not bound to any style sheet. + Unbounds first from previous style sheet. + */ +QStyleSheetItem& QStyleSheetItem::operator=( const QStyleSheetItem& other ) +{ + if ( &other == this ) + return *this; + delete d; + d = new QStyleSheetItemData; + *d = *other.d; + return *this; +} + +/*! + Returns the style sheet this item is in. +*/ +QStyleSheet* QStyleSheetItem::styleSheet() +{ + return d->sheet; +} + +/*! + \overload + + Returns the style sheet this item is in. +*/ +const QStyleSheet* QStyleSheetItem::styleSheet() const +{ + return d->sheet; +} + +/*! + \internal + Internal initialization + */ +void QStyleSheetItem::init() +{ + d->disp = DisplayInline; + + d->fontitalic = Undefined; + d->fontunderline = Undefined; + d->fontstrikeout = Undefined; + d->fontweight = Undefined; + d->fontsize = Undefined; + d->fontsizelog = Undefined; + d->fontsizestep = 0; + d->ncolumns = Undefined; + d->col = QColor(); // !isValid() + d->anchor = FALSE; + d->align = Undefined; + d->valign = VAlignBaseline; + d->margin[0] = Undefined; + d->margin[1] = Undefined; + d->margin[2] = Undefined; + d->margin[3] = Undefined; + d->margin[4] = Undefined; + d->list = ListStyleUndefined; + d->whitespacemode = WhiteSpaceModeUndefined; + d->selfnest = TRUE; + d->lineSpacing = Undefined; +} + +/*! + Returns the name of the style item. +*/ +QString QStyleSheetItem::name() const +{ + return d->stylename; +} + +/*! + Returns the \link QStyleSheetItem::DisplayMode display + mode\endlink of the style. + + \sa setDisplayMode() +*/ +QStyleSheetItem::DisplayMode QStyleSheetItem::displayMode() const +{ + return d->disp; +} + +/*! + \enum QStyleSheetItem::DisplayMode + + This enum type defines the way adjacent elements are displayed. + + \value DisplayBlock elements are displayed as a rectangular block + (e.g. \c{<p>...</p>}). + + \value DisplayInline elements are displayed in a horizontally + flowing sequence (e.g. \c{<em>...</em>}). + + \value DisplayListItem elements are displayed in a vertical + sequence (e.g. \c{<li>...</li>}). + + \value DisplayNone elements are not displayed at all. +*/ + +/*! + Sets the display mode of the style to \a m. + + \sa displayMode() + */ +void QStyleSheetItem::setDisplayMode(DisplayMode m) +{ + d->disp=m; +} + + +/*! + Returns the alignment of this style. Possible values are \c + AlignAuto, \c AlignLeft, \c AlignRight, \c AlignCenter or \c + AlignJustify. + + \sa setAlignment(), Qt::AlignmentFlags +*/ +int QStyleSheetItem::alignment() const +{ + return d->align; +} + +/*! + Sets the alignment to \a f. This only makes sense for styles with + a \link QStyleSheetItem::DisplayMode display mode\endlink of + DisplayBlock. Possible values are \c AlignAuto, \c AlignLeft, + \c AlignRight, \c AlignCenter or \c AlignJustify. + + \sa alignment(), displayMode(), Qt::AlignmentFlags +*/ +void QStyleSheetItem::setAlignment( int f ) +{ + d->align = f; +} + + +/*! + Returns the vertical alignment of the style. Possible values are + \c VAlignBaseline, \c VAlignSub or \c VAlignSuper. + + \sa setVerticalAlignment() +*/ +QStyleSheetItem::VerticalAlignment QStyleSheetItem::verticalAlignment() const +{ + return d->valign; +} + +/*! + \enum QStyleSheetItem::VerticalAlignment + + This enum type defines the way elements are aligned vertically. + This is only supported for text elements. + + \value VAlignBaseline align the baseline of the element (or the + bottom, if the element doesn't have a baseline) with the + baseline of the parent + + \value VAlignSub subscript the element + + \value VAlignSuper superscript the element + +*/ + + +/*! + Sets the vertical alignment to \a valign. Possible values are + \c VAlignBaseline, \c VAlignSub or \c VAlignSuper. + + The vertical alignment property is not inherited. + + \sa verticalAlignment() +*/ +void QStyleSheetItem::setVerticalAlignment( VerticalAlignment valign ) +{ + d->valign = valign; +} + + +/*! + Returns TRUE if the style sets an italic font; otherwise returns + FALSE. + + \sa setFontItalic(), definesFontItalic() +*/ +bool QStyleSheetItem::fontItalic() const +{ + return d->fontitalic > 0; +} + +/*! + If \a italic is TRUE sets italic for the style; otherwise sets + upright. + + \sa fontItalic(), definesFontItalic() +*/ +void QStyleSheetItem::setFontItalic(bool italic) +{ + d->fontitalic = italic?1:0; +} + +/*! + Returns TRUE if the style defines a font shape; otherwise returns + FALSE. A style does not define any shape until setFontItalic() is + called. + + \sa setFontItalic(), fontItalic() +*/ +bool QStyleSheetItem::definesFontItalic() const +{ + return d->fontitalic != Undefined; +} + +/*! + Returns TRUE if the style sets an underlined font; otherwise + returns FALSE. + + \sa setFontUnderline(), definesFontUnderline() +*/ +bool QStyleSheetItem::fontUnderline() const +{ + return d->fontunderline > 0; +} + +/*! + If \a underline is TRUE, sets underline for the style; otherwise + sets no underline. + + \sa fontUnderline(), definesFontUnderline() +*/ +void QStyleSheetItem::setFontUnderline(bool underline) +{ + d->fontunderline = underline?1:0; +} + +/*! + Returns TRUE if the style defines a setting for the underline + property of the font; otherwise returns FALSE. A style does not + define this until setFontUnderline() is called. + + \sa setFontUnderline(), fontUnderline() +*/ +bool QStyleSheetItem::definesFontUnderline() const +{ + return d->fontunderline != Undefined; +} + + +/*! + Returns TRUE if the style sets a strike out font; otherwise + returns FALSE. + + \sa setFontStrikeOut(), definesFontStrikeOut() +*/ +bool QStyleSheetItem::fontStrikeOut() const +{ + return d->fontstrikeout > 0; +} + +/*! + If \a strikeOut is TRUE, sets strike out for the style; otherwise + sets no strike out. + + \sa fontStrikeOut(), definesFontStrikeOut() +*/ +void QStyleSheetItem::setFontStrikeOut(bool strikeOut) +{ + d->fontstrikeout = strikeOut?1:0; +} + +/*! + Returns TRUE if the style defines a setting for the strikeOut + property of the font; otherwise returns FALSE. A style does not + define this until setFontStrikeOut() is called. + + \sa setFontStrikeOut(), fontStrikeOut() +*/ +bool QStyleSheetItem::definesFontStrikeOut() const +{ + return d->fontstrikeout != Undefined; +} + + +/*! + Returns the font weight setting of the style. This is either a + valid \c QFont::Weight or the value \c QStyleSheetItem::Undefined. + + \sa setFontWeight(), QFont +*/ +int QStyleSheetItem::fontWeight() const +{ + return d->fontweight; +} + +/*! + Sets the font weight setting of the style to \a w. Valid values + are those defined by \c QFont::Weight. + + \sa QFont, fontWeight() +*/ +void QStyleSheetItem::setFontWeight(int w) +{ + d->fontweight = w; +} + +/*! + Returns the logical font size setting of the style. This is either + a valid size between 1 and 7 or \c QStyleSheetItem::Undefined. + + \sa setLogicalFontSize(), setLogicalFontSizeStep(), QFont::pointSize(), QFont::setPointSize() +*/ +int QStyleSheetItem::logicalFontSize() const +{ + return d->fontsizelog; +} + + +/*! + Sets the logical font size setting of the style to \a s. Valid + logical sizes are 1 to 7. + + \sa logicalFontSize(), QFont::pointSize(), QFont::setPointSize() +*/ +void QStyleSheetItem::setLogicalFontSize(int s) +{ + d->fontsizelog = s; +} + +/*! + Returns the logical font size step of this style. + + The default is 0. Tags such as \c big define \c +1; \c small + defines \c -1. + + \sa setLogicalFontSizeStep() +*/ +int QStyleSheetItem::logicalFontSizeStep() const +{ + return d->fontsizestep; +} + +/*! + Sets the logical font size step of this style to \a s. + + \sa logicalFontSizeStep() +*/ +void QStyleSheetItem::setLogicalFontSizeStep( int s ) +{ + d->fontsizestep = s; +} + + + +/*! + Sets the font size setting of the style to \a s points. + + \sa fontSize(), QFont::pointSize(), QFont::setPointSize() +*/ +void QStyleSheetItem::setFontSize(int s) +{ + d->fontsize = s; +} + +/*! + Returns the font size setting of the style. This is either a valid + point size or \c QStyleSheetItem::Undefined. + + \sa setFontSize(), QFont::pointSize(), QFont::setPointSize() +*/ +int QStyleSheetItem::fontSize() const +{ + return d->fontsize; +} + + +/*! + Returns the font family setting of the style. This is either a + valid font family or QString::null if no family has been set. + + \sa setFontFamily(), QFont::family(), QFont::setFamily() +*/ +QString QStyleSheetItem::fontFamily() const +{ + return d->fontfamily; +} + +/*! + Sets the font family setting of the style to \a fam. + + \sa fontFamily(), QFont::family(), QFont::setFamily() +*/ +void QStyleSheetItem::setFontFamily( const QString& fam) +{ + d->fontfamily = fam; +} + + +/*!\obsolete + Returns the number of columns for this style. + + \sa setNumberOfColumns(), displayMode(), setDisplayMode() + + */ +int QStyleSheetItem::numberOfColumns() const +{ + return d->ncolumns; +} + + +/*!\obsolete + Sets the number of columns for this style. Elements in the style + are divided into columns. + + This makes sense only if the style uses a block display mode + (see QStyleSheetItem::DisplayMode). + + \sa numberOfColumns() + */ +void QStyleSheetItem::setNumberOfColumns(int ncols) +{ + if (ncols > 0) + d->ncolumns = ncols; +} + + +/*! + Returns the text color of this style or an invalid color if no + color has been set. + + \sa setColor() QColor::isValid() +*/ +QColor QStyleSheetItem::color() const +{ + return d->col; +} + +/*! + Sets the text color of this style to \a c. + + \sa color() +*/ +void QStyleSheetItem::setColor( const QColor &c) +{ + d->col = c; +} + +/*! + Returns whether this style is an anchor. + + \sa setAnchor() +*/ +bool QStyleSheetItem::isAnchor() const +{ + return d->anchor; +} + +/*! + If \a anc is TRUE, sets this style to be an anchor (hypertext + link); otherwise sets it to not be an anchor. Elements in this + style link to other documents or anchors. + + \sa isAnchor() +*/ +void QStyleSheetItem::setAnchor(bool anc) +{ + d->anchor = anc; +} + + +/*! + Returns the whitespace mode. + + \sa setWhiteSpaceMode() WhiteSpaceMode +*/ +QStyleSheetItem::WhiteSpaceMode QStyleSheetItem::whiteSpaceMode() const +{ + return d->whitespacemode; +} + +/*! + Sets the whitespace mode to \a m. + + \sa WhiteSpaceMode +*/ +void QStyleSheetItem::setWhiteSpaceMode(WhiteSpaceMode m) +{ + d->whitespacemode = m; +} + + +/*! + Returns the width of margin \a m in pixels. + + The margin, \a m, can be \c MarginLeft, \c MarginRight, \c + MarginTop, \c MarginBottom, or \c MarginFirstLine. + + \sa setMargin() Margin +*/ +int QStyleSheetItem::margin(Margin m) const +{ + if (m == MarginAll ) { + return d->margin[MarginLeft]; + } else if (m == MarginVertical) { + return d->margin[MarginTop]; + } else if (m == MarginHorizontal) { + return d->margin[MarginLeft]; + } else { + return d->margin[m]; + } +} + + +/*! + Sets the width of margin \a m to \a v pixels. + + The margin, \a m, can be \c MarginLeft, \c MarginRight, \c + MarginTop, \c MarginBottom, \c MarginFirstLine, \c MarginAll, + \c MarginVertical or \c MarginHorizontal. The value \a v must + be >= 0. + + \sa margin() +*/ +void QStyleSheetItem::setMargin(Margin m, int v) +{ + if (m == MarginAll) { + d->margin[MarginLeft] = v; + d->margin[MarginRight] = v; + d->margin[MarginTop] = v; + d->margin[MarginBottom] = v; + } else if (m == MarginVertical ) { + d->margin[MarginTop] = v; + d->margin[MarginBottom] = v; + } else if (m == MarginHorizontal ) { + d->margin[MarginLeft] = v; + d->margin[MarginRight] = v; + } else { + d->margin[m] = v; + } +} + + +/*! + Returns the list style of the style. + + \sa setListStyle() ListStyle + */ +QStyleSheetItem::ListStyle QStyleSheetItem::listStyle() const +{ + return d->list; +} + +/*! + \enum QStyleSheetItem::ListStyle + + This enum type defines how the items in a list are prefixed when + displayed. + + \value ListDisc a filled circle (i.e. a bullet) + \value ListCircle an unfilled circle + \value ListSquare a filled square + \value ListDecimal an integer in base 10: \e 1, \e 2, \e 3, ... + \value ListLowerAlpha a lowercase letter: \e a, \e b, \e c, ... + \value ListUpperAlpha an uppercase letter: \e A, \e B, \e C, ... +*/ + +/*! + Sets the list style of the style to \a s. + + This is used by nested elements that have a display mode of \c + DisplayListItem. + + \sa listStyle() DisplayMode ListStyle +*/ +void QStyleSheetItem::setListStyle(ListStyle s) +{ + d->list=s; +} + + +/*! + Returns a space-separated list of names of styles that may contain + elements of this style. If nothing has been set, contexts() + returns an empty string, which indicates that this style can be + nested everywhere. + + \sa setContexts() +*/ +QString QStyleSheetItem::contexts() const +{ + return d->contxt; +} + +/*! + Sets a space-separated list of names of styles that may contain + elements of this style. If \a c is empty, the style can be nested + everywhere. + + \sa contexts() +*/ +void QStyleSheetItem::setContexts( const QString& c) +{ + d->contxt = QChar(' ') + c + QChar(' '); +} + +/*! + Returns TRUE if this style can be nested into an element of style + \a s; otherwise returns FALSE. + + \sa contexts(), setContexts() +*/ +bool QStyleSheetItem::allowedInContext( const QStyleSheetItem* s) const +{ + if ( d->contxt.isEmpty() ) + return TRUE; + return d->contxt.find( QChar(' ')+s->name()+QChar(' ')) != -1; +} + + +/*! + Returns TRUE if this style has self-nesting enabled; otherwise + returns FALSE. + + \sa setSelfNesting() +*/ +bool QStyleSheetItem::selfNesting() const +{ + return d->selfnest; +} + +/*! + Sets the self-nesting property for this style to \a nesting. + + In order to support "dirty" HTML, paragraphs \c{<p>} and list + items \c{<li>} are not self-nesting. This means that starting a + new paragraph or list item automatically closes the previous one. + + \sa selfNesting() +*/ +void QStyleSheetItem::setSelfNesting( bool nesting ) +{ + d->selfnest = nesting; +} + +/*! + \internal + Sets the linespacing to be at least \a ls pixels. + + For compatibility with previous Qt releases, small values get + treated differently: If \a ls is smaller than the default font + line spacing in pixels at parse time, the resulting line spacing + is the sum of the default line spacing plus \a ls. We recommend + not relying on this behavior. +*/ + +void QStyleSheetItem::setLineSpacing( int ls ) +{ + d->lineSpacing = ls; +} + +/*! + \obsolete + + Returns the linespacing +*/ + +int QStyleSheetItem::lineSpacing() const +{ + return d->lineSpacing; +} + +//************************************************************************ + + + + +//************************************************************************ + + +/*! + \class QStyleSheet qstylesheet.h + \ingroup text + \brief The QStyleSheet class is a collection of styles for rich text + rendering and a generator of tags. + + \ingroup graphics + \ingroup helpsystem + + By creating QStyleSheetItem objects for a style sheet you build a + definition of a set of tags. This definition will be used by the + internal rich text rendering system to parse and display text + documents to which the style sheet applies. Rich text is normally + visualized in a QTextEdit or a QTextBrowser. However, QLabel, + QWhatsThis and QMessageBox also support it, and other classes are + likely to follow. With QSimpleRichText it is possible to use the + rich text renderer for custom widgets as well. + + The default QStyleSheet object has the following style bindings, + sorted by structuring bindings, anchors, character style bindings + (i.e. inline styles), special elements such as horizontal lines or + images, and other tags. In addition, rich text supports simple + HTML tables. + + The structuring tags are + \table + \header \i Structuring tags \i Notes + \row \i \c{<qt>}...\c{</qt>} + \i A Qt rich text document. It understands the following + attributes: + \list + \i \c title -- The caption of the document. This attribute is + easily accessible with QTextEdit::documentTitle(). + \i \c type -- The type of the document. The default type is \c + page. It indicates that the document is displayed in a + page of its own. Another style is \c detail, which can be + used to explain certain expressions in more detail in a + few sentences. For \c detail, QTextBrowser will then keep + the current page and display the new document in a small + popup similar to QWhatsThis. Note that links will not work + in documents with \c{<qt type="detail">...</qt>}. + \i \c bgcolor -- The background color, for example \c + bgcolor="yellow" or \c bgcolor="#0000FF". + \i \c background -- The background pixmap, for example \c + background="granite.xpm". The pixmap name will be resolved + by a QMimeSourceFactory(). + \i \c text -- The default text color, for example \c text="red". + \i \c link -- The link color, for example \c link="green". + \endlist + \row \i \c{<h1>...</h1>} + \i A top-level heading. + \row \i \c{<h2>...</h2>} + \i A sublevel heading. + \row \i \c{<h3>...</h3>} + \i A sub-sublevel heading. + \row \i \c{<h4>...</h4>} \c{<h5>...</h5>} + \i Headings of lesser importance. + \row \i \c{<p>...</p>} + \i A left-aligned paragraph. Adjust the alignment with the \c + align attribute. Possible values are \c left, \c right and + \c center. + \row \i \c{<center>...}<br>\c{</center>} + \i A centered paragraph. + \row \i \c{<blockquote>...}<br>\c{</blockquote>} + \i An indented paragraph that is useful for quotes. + \row \i \c{<ul>...</ul>} + \i An unordered list. You can also pass a type argument to + define the bullet style. The default is \c type=disc; + other types are \c circle and \c square. + \row \i \c{<ol>...</ol>} + \i An ordered list. You can also pass a type argument to + define the enumeration label style. The default is \c + type="1"; other types are \c "a" and \c "A". + \row \i \c{<li>...</li>} + \i A list item. This tag can be used only within the context + of \c{<ol>} or \c{<ul>}. + \row \i \c{<dl>...</dl>} + \i A list of definitions, consisting of terms and descriptions. + \row \i \c{<dt>...</dt>} + \i A term in a list of definitions. This tag can be used only + in the context of \c{<dl>...</dl>}. + \row \i \c{<dd>...</dd>} + \i A description in a list of definitions. This tag can be + used only in the context of \c{<dl>...</dl>}. + \row \i \c{<pre>...</pre>} + \i For larger chunks of code. Whitespaces in the contents are + preserved. For small bits of code use the inline-style \c + code. + \row \i \c{<div>...</div>} and \c{<span>...</span>} + \i Block grouping elements. These are used to structure the + document, and are often used to provide hints about the + intended presentation of the document. + \endtable + + Anchors and links are done with a single tag: + \table + \header \i Anchor tags \i Notes + \row \i \c{<a>...</a>} + \i An anchor or link. + \list + \i A link is created by using an \c href + attribute, for example + <br>\c{<a href="target.qml">Link Text</a>}. Links to + targets within a document are achieved in the same way + as for HTML, e.g. + <br>\c{<a href="target.qml#subtitle">Link Text</a>}. + \i A target is created by using a \c name + attribute, for example + <br>\c{<a name="subtitle"><h2>Sub Title</h2></a>}. + \endlist + \endtable + + The default character style bindings are + \table + \header \i Style tags \i Notes + \row \i \c{<em>...</em>} + \i Emphasized. By default this is the same as \c{<i>...</i>} + (italic). + \row \i \c{<strong>...</strong>} + \i Strong. By default this is the same as \c{<b>...</b>} + (bold). + \row \i \c{<i>...</i>} + \i Italic font style. + \row \i \c{<b>...</b>} + \i Bold font style. + \row \i \c{<u>...</u>} + \i Underlined font style. + \row \i \c{<s>...</s>} + \i Strike out font style. + \row \i \c{<big>...</big>} + \i A larger font size. + \row \i \c{<small>...</small>} + \i A smaller font size. + \row \i \c{<sub>...</sub>} + \i Subscripted text + \row \i \c{<sup>...</sup>} + \i Superscripted text + \row \i \c{<code>...</code>} + \i Indicates code. By default this is the same as + \c{<tt>...</tt>} (typewriter). For larger chunks of code + use the block-tag \c{<}\c{pre>}. + \row \i \c{<tt>...</tt>} + \i Typewriter font style. + \row \i \c{<font>...</font>} + \i Customizes the font size, family and text color. The tag + understands the following attributes: + \list + \i \c color -- The text color, for example \c color="red" or + \c color="#FF0000". + \i \c size -- The logical size of the font. Logical sizes 1 + to 7 are supported. The value may either be absolute + (for example, \c size=3) or relative (\c size=-2). In + the latter case the sizes are simply added. + \i \c face -- The family of the font, for example \c face=times. + \endlist + \endtable + + Special elements are: + \table + \header \i Special tags \i Notes + \row \i \c{<img>} + \i An image. The image name for the mime source factory is + given in the source attribute, for example + \c{<img src="qt.xpm">} The image tag also understands the + attributes \c width and \c height that determine the size + of the image. If the pixmap does not fit the specified + size it will be scaled automatically (by using + QImage::smoothScale()). + <br> + The \c align attribute determines where the image is + placed. By default, an image is placed inline just like a + normal character. Specify \c left or \c right to place the + image at the respective side. + \row \i \c{<hr>} + \i A horizontal line. + \row \i \c{<br>} + \i A line break. + \row \i \c{<nobr>...</nobr>} + \i No break. Prevents word wrap. + \endtable + + In addition, rich text supports simple HTML tables. A table + consists of one or more rows each of which contains one or more + cells. Cells are either data cells or header cells, depending on + their content. Cells which span rows and columns are supported. + + \table + \header \i Table tags \i Notes + \row \i \c{<table>...</table>} + \i A table. Tables support the following attributes: + \list + \i \c bgcolor -- The background color. + \i \c width -- The table width. This is either an absolute + pixel width or a relative percentage of the table's + width, for example \c width=80%. + \i \c border -- The width of the table border. The default is + 0 (= no border). + \i \c cellspacing -- Additional space around the table cells. + The default is 2. + \i \c cellpadding -- Additional space around the contents of + table cells. The default is 1. + \endlist + \row \i \c{<tr>...</tr>} + \i A table row. This is only valid within a \c table. Rows + support the following attribute: + \list + \i \c bgcolor -- The background color. + \endlist + \row \i \c{<th>...</th>} + \i A table header cell. Similar to \c td, but defaults to + center alignment and a bold font. + \row \i \c{<td>...</td>} + \i A table data cell. This is only valid within a \c tr. + Cells support the following attributes: + \list + \i \c bgcolor -- The background color. + \i \c width -- The cell width. This is either an absolute + pixel width or a relative percentage of table's width, + for example \c width=50%. + \i \c colspan -- Specifies how many columns this cell spans. + The default is 1. + \i \c rowspan -- Specifies how many rows this cell spans. The + default is 1. + \i \c align -- Alignment; possible values are \c left, \c + right, and \c center. The default is \c left. + \i \c valign -- Vertical alignment; possible values are \c + top, \c middle, and \c bottom. The default is \c middle. + \endlist + \endtable +*/ + +/*! + Creates a style sheet called \a name, with parent \a parent. Like + any QObject it will be deleted when its parent is destroyed (if + the child still exists). + + By default the style sheet has the tag definitions defined above. +*/ +QStyleSheet::QStyleSheet( QObject *parent, const char *name ) + : QObject( parent, name ) +{ + init(); +} + +/*! + Destroys the style sheet. All styles inserted into the style sheet + will be deleted. +*/ +QStyleSheet::~QStyleSheet() +{ +} + +/*! + \internal + Initialized the style sheet to the basic Qt style. +*/ +void QStyleSheet::init() +{ + styles.setAutoDelete( TRUE ); + + nullstyle = new QStyleSheetItem( this, + QString::fromLatin1("") ); + + QStyleSheetItem* style; + + style = new QStyleSheetItem( this, "qml" ); // compatibility + style->setDisplayMode( QStyleSheetItem::DisplayBlock ); + + style = new QStyleSheetItem( this, QString::fromLatin1("qt") ); + style->setDisplayMode( QStyleSheetItem::DisplayBlock ); + + style = new QStyleSheetItem( this, QString::fromLatin1("a") ); + style->setAnchor( TRUE ); + + style = new QStyleSheetItem( this, QString::fromLatin1("em") ); + style->setFontItalic( TRUE ); + + style = new QStyleSheetItem( this, QString::fromLatin1("i") ); + style->setFontItalic( TRUE ); + + style = new QStyleSheetItem( this, QString::fromLatin1("big") ); + style->setLogicalFontSizeStep( 1 ); + style = new QStyleSheetItem( this, QString::fromLatin1("large") ); // compatibility + style->setLogicalFontSizeStep( 1 ); + + style = new QStyleSheetItem( this, QString::fromLatin1("small") ); + style->setLogicalFontSizeStep( -1 ); + + style = new QStyleSheetItem( this, QString::fromLatin1("strong") ); + style->setFontWeight( QFont::Bold); + + style = new QStyleSheetItem( this, QString::fromLatin1("b") ); + style->setFontWeight( QFont::Bold); + + style = new QStyleSheetItem( this, QString::fromLatin1("h1") ); + style->setFontWeight( QFont::Bold); + style->setLogicalFontSize(6); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style-> setMargin(QStyleSheetItem::MarginTop, 18); + style-> setMargin(QStyleSheetItem::MarginBottom, 12); + + style = new QStyleSheetItem( this, QString::fromLatin1("h2") ); + style->setFontWeight( QFont::Bold); + style->setLogicalFontSize(5); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style-> setMargin(QStyleSheetItem::MarginTop, 16); + style-> setMargin(QStyleSheetItem::MarginBottom, 12); + + style = new QStyleSheetItem( this, QString::fromLatin1("h3") ); + style->setFontWeight( QFont::Bold); + style->setLogicalFontSize(4); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style-> setMargin(QStyleSheetItem::MarginTop, 14); + style-> setMargin(QStyleSheetItem::MarginBottom, 12); + + style = new QStyleSheetItem( this, QString::fromLatin1("h4") ); + style->setFontWeight( QFont::Bold); + style->setLogicalFontSize(3); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style-> setMargin(QStyleSheetItem::MarginVertical, 12); + + style = new QStyleSheetItem( this, QString::fromLatin1("h5") ); + style->setFontWeight( QFont::Bold); + style->setLogicalFontSize(2); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style-> setMargin(QStyleSheetItem::MarginTop, 12); + style-> setMargin(QStyleSheetItem::MarginBottom, 4); + + style = new QStyleSheetItem( this, QString::fromLatin1("p") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style-> setMargin(QStyleSheetItem::MarginVertical, 12); + style->setSelfNesting( FALSE ); + + style = new QStyleSheetItem( this, QString::fromLatin1("center") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setAlignment( AlignCenter ); + + style = new QStyleSheetItem( this, QString::fromLatin1("twocolumn") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setNumberOfColumns( 2 ); + + style = new QStyleSheetItem( this, QString::fromLatin1("multicol") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + (void) new QStyleSheetItem( this, QString::fromLatin1("font") ); + + style = new QStyleSheetItem( this, QString::fromLatin1("ul") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setListStyle( QStyleSheetItem::ListDisc ); + style-> setMargin(QStyleSheetItem::MarginVertical, 12); + style->setMargin( QStyleSheetItem::MarginLeft, 40 ); + + style = new QStyleSheetItem( this, QString::fromLatin1("ol") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setListStyle( QStyleSheetItem::ListDecimal ); + style-> setMargin(QStyleSheetItem::MarginVertical, 12); + style->setMargin( QStyleSheetItem::MarginLeft, 40 ); + + style = new QStyleSheetItem( this, QString::fromLatin1("li") ); + style->setDisplayMode(QStyleSheetItem::DisplayListItem); + style->setSelfNesting( FALSE ); + + style = new QStyleSheetItem( this, QString::fromLatin1("code") ); + style->setFontFamily( QString::fromLatin1("Courier New,courier") ); + + style = new QStyleSheetItem( this, QString::fromLatin1("tt") ); + style->setFontFamily( QString::fromLatin1("Courier New,courier") ); + + new QStyleSheetItem(this, QString::fromLatin1("img")); + new QStyleSheetItem(this, QString::fromLatin1("br")); + new QStyleSheetItem(this, QString::fromLatin1("hr")); + + style = new QStyleSheetItem(this, QString::fromLatin1("sub")); + style->setVerticalAlignment( QStyleSheetItem::VAlignSub ); + style = new QStyleSheetItem(this, QString::fromLatin1("sup")); + style->setVerticalAlignment( QStyleSheetItem::VAlignSuper ); + + style = new QStyleSheetItem( this, QString::fromLatin1("pre") ); + style->setFontFamily( QString::fromLatin1("Courier New,courier") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setWhiteSpaceMode(QStyleSheetItem::WhiteSpacePre); + style-> setMargin(QStyleSheetItem::MarginVertical, 12); + + style = new QStyleSheetItem( this, QString::fromLatin1("blockquote") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setMargin(QStyleSheetItem::MarginHorizontal, 40 ); + + style = new QStyleSheetItem( this, QString::fromLatin1("head") ); + style->setDisplayMode(QStyleSheetItem::DisplayNone); + style = new QStyleSheetItem( this, QString::fromLatin1("body") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style = new QStyleSheetItem( this, QString::fromLatin1("div") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock) ; + style = new QStyleSheetItem( this, QString::fromLatin1("span") ); + style = new QStyleSheetItem( this, QString::fromLatin1("dl") ); + style-> setMargin(QStyleSheetItem::MarginVertical, 8); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style = new QStyleSheetItem( this, QString::fromLatin1("dt") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setContexts(QString::fromLatin1("dl") ); + style = new QStyleSheetItem( this, QString::fromLatin1("dd") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setMargin(QStyleSheetItem::MarginLeft, 30); + style->setContexts(QString::fromLatin1("dt dl") ); + style = new QStyleSheetItem( this, QString::fromLatin1("u") ); + style->setFontUnderline( TRUE); + style = new QStyleSheetItem( this, QString::fromLatin1("s") ); + style->setFontStrikeOut( TRUE); + style = new QStyleSheetItem( this, QString::fromLatin1("nobr") ); + style->setWhiteSpaceMode( QStyleSheetItem::WhiteSpaceNoWrap ); + + // compatibily with some minor 3.0.x Qt versions that had an + // undocumented <wsp> tag. ### Remove 3.1 + style = new QStyleSheetItem( this, QString::fromLatin1("wsp") ); + style->setWhiteSpaceMode( QStyleSheetItem::WhiteSpacePre ); + + // tables + style = new QStyleSheetItem( this, QString::fromLatin1("table") ); + style = new QStyleSheetItem( this, QString::fromLatin1("tr") ); + style->setContexts(QString::fromLatin1("table")); + style = new QStyleSheetItem( this, QString::fromLatin1("td") ); + style->setContexts(QString::fromLatin1("tr")); + style = new QStyleSheetItem( this, QString::fromLatin1("th") ); + style->setFontWeight( QFont::Bold ); + style->setAlignment( Qt::AlignCenter ); + style->setContexts(QString::fromLatin1("tr")); + + style = new QStyleSheetItem( this, QString::fromLatin1("html") ); +} + + + +static QStyleSheet* defaultsheet = 0; +static QSingleCleanupHandler<QStyleSheet> qt_cleanup_stylesheet; + +/*! + Returns the application-wide default style sheet. This style sheet + is used by rich text rendering classes such as QSimpleRichText, + QWhatsThis and QMessageBox to define the rendering style and + available tags within rich text documents. It also serves as the + initial style sheet for the more complex render widgets, QTextEdit + and QTextBrowser. + + \sa setDefaultSheet() +*/ +QStyleSheet* QStyleSheet::defaultSheet() +{ + if (!defaultsheet) { + defaultsheet = new QStyleSheet(); + qt_cleanup_stylesheet.set( &defaultsheet ); + } + return defaultsheet; +} + +/*! + Sets the application-wide default style sheet to \a sheet, + deleting any style sheet previously set. The ownership is + transferred to QStyleSheet. + + \sa defaultSheet() +*/ +void QStyleSheet::setDefaultSheet( QStyleSheet* sheet) +{ + if ( defaultsheet != sheet ) { + if ( defaultsheet ) + qt_cleanup_stylesheet.reset(); + delete defaultsheet; + } + defaultsheet = sheet; + if ( defaultsheet ) + qt_cleanup_stylesheet.set( &defaultsheet ); +} + +/*!\internal + Inserts \a style. Any tags generated after this time will be + bound to this style. Note that \a style becomes owned by the + style sheet and will be deleted when the style sheet is destroyed. +*/ +void QStyleSheet::insert( QStyleSheetItem* style ) +{ + styles.insert(style->name(), style); +} + + +/*! + Returns the style called \a name or 0 if there is no such style. +*/ +QStyleSheetItem* QStyleSheet::item( const QString& name) +{ + if ( name.isNull() ) + return 0; + return styles[name]; +} + +/*! + \overload + + Returns the style called \a name or 0 if there is no such style + (const version) +*/ +const QStyleSheetItem* QStyleSheet::item( const QString& name) const +{ + if ( name.isNull() ) + return 0; + return styles[name]; +} + + +/*! + \preliminary + + Generates an internal object for the tag called \a name, given the + attributes \a attr, and using additional information provided by + the mime source factory \a factory. + + \a context is the optional context of the document, i.e. the path + to look for relative links. This becomes important if the text + contains relative references, for example within image tags. + QSimpleRichText always uses the default mime source factory (see + \l{QMimeSourceFactory::defaultFactory()}) to resolve these + references. The context will then be used to calculate the + absolute path. See QMimeSourceFactory::makeAbsolute() for details. + + \a emptyTag and \a doc are for internal use only. + + This function should not be used in application code. +*/ +#ifndef QT_NO_TEXTCUSTOMITEM +QTextCustomItem* QStyleSheet::tag( const QString& name, + const QMap<QString, QString> &attr, + const QString& context, + const QMimeSourceFactory& factory, + bool /*emptyTag */, QTextDocument *doc ) const +{ + const QStyleSheetItem* style = item( name ); + // first some known tags + if ( !style ) + return 0; + if ( style->name() == "img" ) + return new QTextImage( doc, attr, context, (QMimeSourceFactory&)factory ); + if ( style->name() == "hr" ) + return new QTextHorizontalLine( doc, attr, context, (QMimeSourceFactory&)factory ); + return 0; +} +#endif + + +/*! Auxiliary function. Converts the plain text string \a plain to a + rich text formatted paragraph while preserving most of its look. + + \a mode defines the whitespace mode. Possible values are \c + QStyleSheetItem::WhiteSpacePre (no wrapping, all whitespaces + preserved) and \c QStyleSheetItem::WhiteSpaceNormal (wrapping, + simplified whitespaces). + + \sa escape() +*/ +QString QStyleSheet::convertFromPlainText( const QString& plain, QStyleSheetItem::WhiteSpaceMode mode ) +{ + int col = 0; + QString rich; + rich += "<p>"; + for ( int i = 0; i < int(plain.length()); ++i ) { + if ( plain[i] == '\n' ){ + int c = 1; + while ( i+1 < int(plain.length()) && plain[i+1] == '\n' ) { + i++; + c++; + } + if ( c == 1) + rich += "<br>\n"; + else { + rich += "</p>\n"; + while ( --c > 1 ) + rich += "<br>\n"; + rich += "<p>"; + } + col = 0; + } else { + if ( mode == QStyleSheetItem::WhiteSpacePre && plain[i] == '\t' ){ + rich += 0x00a0U; + ++col; + while ( col % 8 ) { + rich += 0x00a0U; + ++col; + } + } + else if ( mode == QStyleSheetItem::WhiteSpacePre && plain[i].isSpace() ) + rich += 0x00a0U; + else if ( plain[i] == '<' ) + rich +="<"; + else if ( plain[i] == '>' ) + rich +=">"; + else if ( plain[i] == '&' ) + rich +="&"; + else + rich += plain[i]; + ++col; + } + } + if ( col != 0 ) + rich += "</p>"; + return rich; +} + +/*! + Auxiliary function. Converts the plain text string \a plain to a + rich text formatted string with any HTML meta-characters escaped. + + \sa convertFromPlainText() +*/ +QString QStyleSheet::escape( const QString& plain) +{ + QString rich; + for ( int i = 0; i < int(plain.length()); ++i ) { + if ( plain[i] == '<' ) + rich +="<"; + else if ( plain[i] == '>' ) + rich +=">"; + else if ( plain[i] == '&' ) + rich +="&"; + else + rich += plain[i]; + } + return rich; +} + +// Must doc this enum somewhere, and it is logically related to QStyleSheet + +/*! + \enum Qt::TextFormat + + This enum is used in widgets that can display both plain text and + rich text, e.g. QLabel. It is used for deciding whether a text + string should be interpreted as one or the other. This is normally + done by passing one of the enum values to a setTextFormat() + function. + + \value PlainText The text string is interpreted as a plain text + string. + + \value RichText The text string is interpreted as a rich text + string using the current QStyleSheet::defaultSheet(). + + \value AutoText The text string is interpreted as for \c RichText + if QStyleSheet::mightBeRichText() returns TRUE, otherwise as + \c PlainText. + + \value LogText A special, limited text format which is only used + by QTextEdit in an optimized mode. +*/ + +/*! + Returns TRUE if the string \a text is likely to be rich text; + otherwise returns FALSE. + + This function uses a fast and therefore simple heuristic. It + mainly checks whether there is something that looks like a tag + before the first line break. Although the result may be correct + for common cases, there is no guarantee. +*/ +bool QStyleSheet::mightBeRichText( const QString& text) +{ + if ( text.isEmpty() ) + return FALSE; + int start = 0; + + while ( start < int(text.length()) && text[start].isSpace() ) + ++start; + if ( text.mid( start, 5 ).lower() == "<!doc" ) + return TRUE; + int open = start; + while ( open < int(text.length()) && text[open] != '<' + && text[open] != '\n' ) { + if ( text[open] == '&' && text.mid(open+1,3) == "lt;" ) + return TRUE; // support desperate attempt of user to see <...> + ++open; + } + if ( open < (int)text.length() && text[open] == '<' ) { + int close = text.find('>', open); + if ( close > -1 ) { + QString tag; + for (int i = open+1; i < close; ++i) { + if ( text[i].isDigit() || text[i].isLetter() ) + tag += text[i]; + else if ( !tag.isEmpty() && text[i].isSpace() ) + break; + else if ( !text[i].isSpace() && (!tag.isEmpty() || text[i] != '!' ) ) + return FALSE; // that's not a tag + } + return defaultSheet()->item( tag.lower() ) != 0; + } + } + return FALSE; +} + + +/*! + \fn void QStyleSheet::error( const QString& msg) const + + This virtual function is called when an error occurs when + processing rich text. Reimplement it if you need to catch error + messages. + + Errors might occur if some rich text strings contain tags that are + not understood by the stylesheet, if some tags are nested + incorrectly, or if tags are not closed properly. + + \a msg is the error message. +*/ +void QStyleSheet::error( const QString& ) const +{ +} + + +/*! + Scales the font \a font to the appropriate physical point size + corresponding to the logical font size \a logicalSize. + + When calling this function, \a font has a point size corresponding + to the logical font size 3. + + Logical font sizes range from 1 to 7, with 1 being the smallest. + + \sa QStyleSheetItem::logicalFontSize(), QStyleSheetItem::logicalFontSizeStep(), QFont::setPointSize() + */ +void QStyleSheet::scaleFont( QFont& font, int logicalSize ) const +{ + if ( logicalSize < 1 ) + logicalSize = 1; + if ( logicalSize > 7 ) + logicalSize = 7; + int baseSize = font.pointSize(); + bool pixel = FALSE; + if ( baseSize == -1 ) { + baseSize = font.pixelSize(); + pixel = TRUE; + } + int s; + switch ( logicalSize ) { + case 1: + s = 7*baseSize/10; + break; + case 2: + s = (8 * baseSize) / 10; + break; + case 4: + s = (12 * baseSize) / 10; + break; + case 5: + s = (15 * baseSize) / 10; + break; + case 6: + s = 2 * baseSize; + break; + case 7: + s = (24 * baseSize) / 10; + break; + default: + s = baseSize; + } + if ( pixel ) + font.setPixelSize( s ); + else + font.setPointSize( s ); +} + +#endif // QT_NO_RICHTEXT |